Apparatus for treating pulp.



PATENTED APR.28,1908.

A. s. CALDWELL. APPARATUS FOR TREATING PULP.

. APPLIOATION FILED NOV. 29, 1907.

4 SHEETS-SHEET 1.

\ PATENTED APR. 28, 1908. A. s. CALDWELL. APPARATUS FOR TREATI NG PULPAPPLICATION FILED NOV. 29, 1907.

4 SHEETS-SHEET 2.

PATENTED APR. 28, 1903.

A. S. CALDWELL. APPARATUS FOR TREATING PULP.

APPLICATION FILED NOV. 29, 1907.

4 SHEETS-SHEET 3.

No. 886.186. PATENTED APR. 28, 1908. A. s. CALDWELL. APPARATUS FORTREATING PULP.

APYLIOATION FILED NOV. 29, 1907.

4SHEETSSHEBT 4.

"rh -WWW? APPARATUS FOR Application filed. November 28, 1907.

Specification of Letters Patent.

TREATING IEULP.

Patented April 28, 1908.

Serial No. 04,361.

-'.ZZ whom it may concern:

Be it known thnt .l, ALFRED Schwinn- VILLE Ciirnu'x'nr, a subject of theQing of Great Britain and Ireland, residing invcrkeithing, in the countyof Fife, Scotland, have invented Improvements in Apparatus Trent-in uip,of which the following is d- S g POL): lieu tion.

This invention has reference to that kind of apparatus for treating pulpwherein there are employed in conjunction with a suitable beating rollprovided 'ith appropriate knives or 31s other plates, supported in oyielding nmnuer by fluid pressure in such :1 as to exert a flatteningand softening action upon fibers under treatment, the last mentionedplates being fixed. in a plate bbx which is locutcd in an outer boxprovided with an elastic diophrspin on which the bottom of the plate boxrests, u chamber for liquid, such as Water, being provided bctween thesaid elastic diaphragm and the bottom of the outc' box to form ayielding support for the plate box.

it has been found in practice that such ape pzu'utus, as hcrctcdorcconstructed, cannot be relied upon, its efficiency being liable tobecome iiugjmircd in consequence of entry and gradual :u-cumulutioubetween the inner and outer boxes of solid uuittcrs which interlcrc withand more or less prevent the necessary resilient action. and the presentinvention is designed to obviiitc this evil. For this purpose there iscombined with the plate box and outer box, an elastic closure zuhiptedto effectually close communication between the trough in which theboating roll works and the interior of the outer box, While at the sometime leaving the plate box free to move suilicicntly to admit of thenecessary adjustment and resilient action relatively to the roll.

The closure may be a diaphragm of indie rubber fitting accurately overthe top ed 'es of the plate box and outer box and so secured as to forma fluid tight joint therewith. In some cases this diaphragm may becorrugated. Provision is also made for the intro duction of lubricantbetween the adjacent surfaces of the plate box and the outer box, andfor indicating any leakage of liquid from the lubricant chamber formedby and bc tween the boxes and the elastic diaphragm and elastic closure.

In order still further to insure the neces the outer box, antifrictionrollers or other ontifrictionsl devices or may be provided between them.In some cases, especially where the plate box is of considerable length,side Wings or ribs are or may be provided, so arranged as to preventendwise tilting or inclination the plate box.

The outer box is or may be located in on appropriate den. Tlicrc may bemore than one den provided with plate boxes as described. in some cases,one or more dens in machine may be provided with a plate box or boxeswith outer boxes and devices according to the present invention and oneor more other dens with of apparatus, such fixed knives, appropriatelyconstructed to perform cutting operations such as do not :sitatc theresilient action dcsiru ble where mere flattening and softening ot thefibers are to be effected.

Apparatus according to this invention can be variously constructed, andit is opplicable to various classes of beating machines including dishmachines and refiners.

In the accompanying illustrative drawings, Figure 1 shows in c osssection, a combincd. plate box and outer x sounding to this invention,removed from a beating engine of the kind known as u Hollander. Figs. 2and 3 are side elevations of p0rtions of two known forms oi suchmachines provided with the improved combined plate Fig. 4 is a detailView box and outer boxes. showing a nnnlrl cstion. Flg. 5 1s a sideelevation, partly in section, and Fig. 6 a cross section on the line A Aof Fig. 5, showing a refining machine. provided with combined plateboxes and outer boxes according to the invention; Fig. 7 is section ofone of the combined plate boxes and outer boxes of Fig. 5, drawn to a.larger scale, and Fig. 8 is a part longitudinal section thereof taken onthe line B B of Fig. 7.

As shown in Figs. 1 and. 2, a is a movable plate of the kind referred tohaving a concove surface 6 approximating to the periphand surface of.the beating roll 0 and carried by a plate box d through the intermediaryof wooden or like packing strips e and f.

g is the ordinary outer box provided with a separate bottom plate h, thetwo parts being secured together by bolts and nuts '2 and clampingbetween them, at its edges,

the elastic diaphragm j which is formed of good soft indie rubber uponwhich the b0ttern of the platebox d rests and which formsexample goodsoft india rubber, that covers s ending outer the upper ends ofthe'boxes d and g and through which the shank a of the plate (1 extends.'lhe'said diaphragm is secured at its edges to the parallel i'ree edgesand ends of the boxes b metal bars a which are secured to the oxes, asby bolts and nuts 72, so

as to produce a fluid tight joint between the parts and ermit of freemovement of the plate box within theouter box g without permittingmatter to enter between the coacting surfaces of the boxes and effectsuch movement. The diaphragm m 13 preferably made with a curved orcorrugated p'art m to increase its flexibility. p

o are antifriction balls provided for the, same'purpose of facilitatingthe movement of the late box d, each setof balls being convenientlyhoused in a recess h in the outer box g. p

it will be understood that the outer box g is'located in an appropriateden'in the roll trough p, the machines shown in Figs. Zand 3- be1n%provided each with three such dens p, eac provided with a combined platebox and outer box as, described. 1

In Fig. 2, g re resent water inlet pipes each leading to t ecorresponding port 7c (Fig. 1) of the li' uid chambers 7c of the correox g. g are gages for in-- mating the fluid pressure in such chambers; gcooks for controlling the supply of liquid to the chambers, and-.5 1outlet pipes, controlled by cocks {5 by which 1i uid can be drainedfi'orn the said chain era when necessary;

- To lubricate the interior of the outer box h, or each outeribox, oneor each end of such box may be rovided with one or more holes 72. (see is. 1 and 2) through which lubricant, such or example as a mixture ofsoft soap and plumbago, can be introduced by any convenient means such'as a brush, mop or red. Each outer box 9 may also be provided at'oneend with a hole 7' and at tached pipe 7' (Fig. 3) to indicate anyleakage of li'uld from the outer box 9, such as would take place shouldeither of the-diaphragms 7' or m become fractured during working andallow water to pass from the chamber 7c or trough 32 into the box g.

Fig. 4 shows a modification wherein the balls 0 of Fig. 1 are replacedby stri s 0 oil brass or other suitable metal attache to the sides ofthe plate boxdand having rounded extremities to insure easy movement oisuch box.

Referring now to Figs. 5, 6 and 7 which.

seeaee ends to and between disk plates 8 which are capable of beingrotated upon rollers s, to facihtate the assembling of the arts, butwhich are normally held stationary by clamping the same, as by bolts 8tostationary brackets or feet 8 The spaces'between' the respective boxesg are occupied b blocks tof wood or other suitable materia toconstitute, in offeet, dens for the boxes, the said blocks t be 'ingattached to the boxes by straps tattached by studs 3 to bosses on theboxes. Each outer box g,'in this example, as shown more particularly inFig. 7, contains three independently movable plat e boxes d placed arefaced so that they can slide smoothly. one

i box g, A sheet m of india rubber covers the open end of the outer box9 to the edges of which it is secured by clampingstrips n and screws a,as in Fig. 1, the said. sheet being formed with slots through which theshank portions 0 of the plates a pass, and

tween which and the p ates a it is clam ed by bolts a which extendthrough the p ates a thereof (Fi .8) and are tightened up by nuts 22.

Wh'atl c aim is:-

combination with a movable plate carrier with plate and a stationaryouter box having an elastic diaphra in upon which said plate carrierbears and, betweenf its lower end and pressure to form a yieldingsupport for said movable plate carrier, of means adapted to prevententry of pulp material between'said movable plate carrier and outer-boxwhile leaving said carrier free to move sufliciently to admit of thenecessary adjustment and ie-.

with which said movable plate ho plate is used.

2. In apparatus for treating pulp, the combination with a movable platecarrier with plate, and a-stationar'y outer box provided illustrate arefining machine, a, number ofouter boxes 5; are arranged equidistantlyina circle around the roll 0 and attached at their one behind the otherand inade in the form of l recessed bars having lateral webs d? whichupon another and against the inner surface oft e *1. in an apparatus fortreating pulp, the' extending over the ed' esfof the boxes d be Y andboxes d into openings :1: in the webs said diaphragm, a chamber forliquid under silient action relatively to the beating device l er withat its lower end with a yielding support for same? i entry of surieees 1i yielding 'upp hustle (luiphis m. secured huts? he):

liquid 25 leakage outlet the ho); threu 01 ell t'e all Ii 1i p holpli'it' l: tieimry cute? hox prodiziphi'egm upon which ml :1 ciuiiuheii. l? liqll gin and the bottom or preventing entry of .1) hold to theadja- '4 i of said l i, Mi [mu 11s mules (out s while lei mud and 0 Tilla i-uiuliii elastic supo Sll carrier the us or tieating pulp, the :01i pulp holder, a heating n, t QO-Hfitlllg plate, a sliding erel'oi, midstationary outer box h yinl'ling support he said plate carrier, of meanslei preventing entiy of material item said pulp holder to thespacebetween said CELIIiBl and box, and. anti'frictional devices betweensaid earlier and box.

10. iii apparatus for treating pulp, the cemliinatiun with a, pulpholder, it heating roll therein, :1- 00-2 ting plate, :1 sliding carriertherefor, and sta 0' y outer box with yielding suppoi L A ding carrier,of an elastic closure between said eerriez; diipted to prevent mate ipulp holder to the adjalid carrier and box, and vices engagiu suchsliding antil iietioiial de carrier and b ll. In upesizitus for treatingpulp, the eemhination with a. pulp holder, a heating device th '11,. a(o-acting plate, a, sliding eter, and a stationary outer box withyielding support for said plate carrier, of an el isiie cl kSL'lEG fezpreventing entry of material said mule holder to the Slltllll? suilacesu; said lie and outer hora, said l) X having one or were openingstherein. for the in roduction of lubricant between said ppmstus fortreating pulp, comprising :l pulp holder, a beating roll therein, aplate coasting with said I'Jll, plate box in which the plate is rigidlymounted, it containing box in which the plate hex isi iee to slidetowerds and *om the healing 'roll, said containing box. he an elasticdiaphragm upon which said phi box bears and a chamber between its lowend and said diaphragm loi liquid under pressure to form it yieldingsupport for said plate hex, and an elastic diaphragm ee necliug the odeel both boxes which went th the eating roll.

1.". flippers lug pulp, COIUPTl l pulp lu' mu m therein,

d roll. a plz 0 hex niuiuit 4 the edges of both her-Les llo the lmdiuigroll, and 2 i i l: .i I-n m +1, Mowin iii mum newt/bu u1e eoaupris- Igames comiaiming box having an hsticdiaphr the' ortion 'of the outerboxbetwec'm "s id- 4 upon which said plume box beam and acham dia a S- I aa v 1 her. between its lower and and said diaphragm t i nefit Edinburghthis @hirteenth day' -g.

for liquid under pressure 1;;0 form-:2. yildmg of November 1907.

support for said plate box, an alastie fdiaw ALFREDWEBER-TITLECALDWELL.-

phrayn colmgatmg the ecfigea of 190th axes Wxtnesses: I gvhic are gzdgcergt to the beatihg r0 a'nd FREDERICK PIATT, mews for mdlcatmg leakageof liquid from ,L GEORGE HUTTON.

